[BUG] Performance Issue When Editing Large FIles

Question

Are other people experiencing this on the latest JDevelopers (11.1.1.4.0 and the version before it) ?
People in the office have been experiencing extremely slow performance happening seemingly at random while editing Java files. We have been using JDev for almost 10 years and this has only become an issue for us recently. Typically we only use the Java editing and the database functionality in JDev.
I have always felt that the issue has been related to network traffic created by Clearcase and have never really paid attention, but a few days ago after upgrading to the latest version of JDev, for the first time I started having slowdowns that are affecting my speed of work and decided to look into it,
The main symptom is the editor hanging for an unknown reason in the middle of typing a line (even in a comment) or immediately after hitting the carriage return. All PCs in the office have 2Gig or more RAM and are well within recommended spec.
I've been experimenting for a few days to try and determine what exactly is at the root of the slowness. Among the things I have tried:
o cutting Clearcase out of the equation; not using it for the project filesystem; not connectiing to it in JDev
o Not using any features other than Java editing in JDev (no database connections)
o never using split panes for side by side editing
o downloading the light version of JDev
o Increasing speed of all pop-ups/dynamic helpers to maximum in the options
o disabling as many helpers and automations as possible in the options
None of these have helped. Momentary freezes of 3-5 seconds while editing are common. My basic test case is simply to move the cursor from one line to another and to type a simple one-line comment that takes up most of the line. I get the freeze most usually right after typing the "//" to open the comment - it happens almost 100% of the time.
I have however noticed a link to the file size/complexity.
If I perform my tests on a small/medium sized file of about 1000 lines (20-30 methods) performance is always excellent.
If I perform my test on one of our larger files 10000 lines ( more than 100 methods) the freezes while editing almost always occur.
It looks like there is some processor intensive stuff going on (which cannot be turned off via the options panel) which is taking control of the code editor and not completing in a reasonable amount of time on large Java files. I have a suspicion that it's somehow related to the gutter on the right hand side which show little red and yellow marks for run-time reports of compile errors and warnings and haven't found any way to disable it so I can check.

Answer 1

Just a small follow-up....
It looks like the problem is happening on only a single Java file in our product! Unfortunately it happens to be the largest and most often updated file in the project.
I'm still poking around to figure out why JDev is choking consistently on this one particular file and not on any of the others. The size/complexity is not much bigger than the next largest which can be edited without problems. The problem file is a little unusual in that it contains a large number of static functions and members.
Nice little mystery to solve.